Electromagnetically actuated vibrator



Sept 13, 1949. H. J. sEvlC-iNY 2,482,033

ELECTROMAGNEICALLY ACTUATED VIBRATOR Filed April 5, 1947' /3 j. l? A5 g yz 3. /A5

, INVENTOR.

1276222? u? Seal/@Wy Avro Ri N EYB Patented Sept. 13, 1949 STATES PATENT OFFICE ELECTROMAGNETICALLY ACTUTED VIBRATOR Henry J. Scvigny, Methuen, Mass.

Application April 3, 1947, Serial No. 739,193

3 Claims. (Cl. 172-126) This invention relates to a radio set testing device.

It is an object of the present invention to provide a testing device or probe which will vibrate when applied to the radio parts such as tubes, condensers, resistors and transformers, will produce a noise in the speaker of the radio set if any of the parts are defective as a result of poor soldering connections or loose elements within the parts.

Other objects of the present invention are to provide a radio set testing device, which is of simple construction, easy to handle and operate, inexpensive to manufacture and eicient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. 1 is a side elevational view of my radio set testing device.

Fig. 2 is a longitudinal cross-sectional view of the testing device showing the internal parts thereof.

Fig. 3 is an end elevational view of the testing from its upper end and outwardly through an 1 end member I5 on the end of the casing. Within the solenoid is a core I6 having a recess I1 with a coil spring I8 therein adapted to engage with an armature I9 made of soft iron and having rings 2I extending around its forward end. Connested to the armature is a Lucite rod 22 which extends through a sleeve 23 with a tapered exterior surface 24. The connection of the rod 22 with the soft iron armature I9 i-s eiected by means of a threaded rod 25 threaded into both the core I6 and the Lucite rod 22. Surrounding the Lucite adjacent to the armature I9 is a rubber sleeve or bumper 25. The spring I3 urges the armature I9 away from the end of the core IS. When alternating current is applied to the wires I3, the armature I9 will vibrate so as to knock upon the parts of the radio which the testing device is applied to. The Lucite 22 being of soft material none of the parts with which the testing device engages will be burred.

While various changes can be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as dei'lncd by the appended claims.

I claim:

1. In a radio set testing device, a hollow casing provided with an annular shoulder intermediate its ends, a solenoid adapted to be connected to a source of electrical energy positioned within said casing and having one end abutting said shoulder, a core disposed longitudinally within said solenoid, there being a recess extending inwardly from one end of said core for a portion of its length, an armature arranged contiguous to the recessed end Iof said core and mounted for movement toward and away from the latter, resilient means seated in said recess and operatively connected to one end of said core and said armature for normally biasing the latter apart, a sleeve spaced from said armature and closing an end of said casing, a Lucite rod operatively connected to said armature and projecting through said sleeve, and resilient means interposed between said armature and sleeve for limiting the movement of said armature away from said core.

2. In a radio set testing device, a hollow casing provided with an annular shoulder intermediate its ends, a solenoid adapted to be connected to a source of electrical energy positioned Within said casing and having one end abutting said shoulder, a core disposed longitudinally within said solenoid, there being a recess extending inwardly from one end of said core for a portion of its length, an armature arranged contiguous to the recessed end of said core and mounted for movement toward and away from the latter, resilient means embodying a coi1 spring seated in said recess and operatively connected to one end of said core and said armature for normally biasing the latter apart, a sleeve spaced from said armature and closing an end of said casing, a Lucite rod operatively connected to said armature and projecting through said sleeve, and resilient F means embodying a rubber bumper circumposed about said rod and interposed between said armature and sleeve for limiting the movement of said armature away from said core.

3. In a radio set testing device, a hollow casing provided with an annular shoulder intermediate its ends, a solenoid adapted to be connected to a source of electrical energy positioned within said casing and having one end abutting said shoulder, a core disposed longitudinally within said solenoid, an armature arranged contiguous to said core and mounted for movement towards and away from the latter, resilient means operatively connected to one end of said core and said armature for normally biasing the latter apart, a sleeve spaced from said armature and closing an end of said casing, a Lucite rod operatively connected to said armature and projecting through said sleeve, and resilient means interposed between said armature and sleeve for limiting the movement of said armature away from said core.

HENRY J. SEVIGNY.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 368 948 Helmer Aug. 30, 1887 574,025 Edgeoomb Dec. 19, 1896 1,325,375 Patowsk Dec. 16, 1919 1,772,852 Bates Aug. 12, 1930 OTHER REFERENCES Handbook of Plastics, Simonds 8a Ellis, page 796, D. Van Nostrand, New York, 1943. 

